DOOM II (Classic)
19 Achievements
1,000
40-50h
PC
Xbox One
Xbox Series
Not So Friendly Fire
Cause an enemy to kill another enemy
25
63.79%
How to unlock the Not So Friendly Fire achievement in DOOM II (Classic) - Definitive Guide
A video guide for the achievement. MAP 4 basically gives you this achievement in the first room.
This should just come naturally, however if you haven't been able to unlock this one, try and get two enemies to stand in a line. The enemy at the back, while he attempts to shoot you, will shoot the enemy closest to you. This will start a war between the two enemies and when one of them dies, you will be rewarded with 25GS.
Can be done on the very first room on Hell on Earth on I'm too young to die difficulty. Start a new game, shoot one of the zombie soldiers in front of you to 'wake them up'. Strafe side to side to line them up eventually one will shoot the other and kill him... achievement popped